public void GetNextInterval_NegativeInterval_ReturnsOneTick()
{
var now = DateTime.Now;
var next = now.Subtract(TimeSpan.FromSeconds(1));
var interval = TimerListener.GetNextTimerInterval(next, now);
Assert.Equal(1, interval.Ticks);
}
public void GetNextInterval_NextWithinDST_ReturnsExpectedValue(TimerSchedule schedule, TimeSpan expectedInterval)
{
// This only works with a DST-supported time zone, so throw a nice exception
if (!TimeZoneInfo.Local.SupportsDaylightSavingTime)
{
throw new InvalidOperationException("This test will only pass if the time zone supports DST.");
}
// Running at 1:59 AM, i.e. one minute before the DST switch at 2 AM on 3/11 (Pacific Standard Time)
// Note: this test uses Local time, so if you're running in a timezone where
// DST doesn't transition the test might not be valid.
var now = new DateTime(2018, 3, 11, 1, 59, 0, DateTimeKind.Local);
var next = schedule.GetNextOccurrence(now);
var interval = TimerListener.GetNextTimerInterval(next, now, schedule.AdjustForDST);
Assert.Equal(expectedInterval, interval);
}
public void GetNextInterval_NextAfterDST_ReturnsExpectedValue()
{
// Running on the Friday before the DST switch at 2 AM on 3/11 (Pacific Standard Time)
// Note: this test uses Local time, so if you're running in a timezone where
// DST doesn't transition the test might not be valid.
var now = new DateTime(2018, 3, 9, 18, 0, 0, DateTimeKind.Local);
// Configure schedule to run again on the next Friday (3/16) at 6 PM (Pacific Daylight Time)
var schedule = CrontabSchedule.Parse("0 0 18 * * 5", new CrontabSchedule.ParseOptions()
{
IncludingSeconds = true
});
var next = schedule.GetNextOccurrence(now);
var interval = TimerListener.GetNextTimerInterval(next, now);
// One week is normally 168 hours, but it's 167 hours across DST
Assert.Equal(167, interval.TotalHours);
}
public void GetNextInterval_NextWithinDST_ReturnsExpectedValue()
{
// Running at 1:59 AM, i.e. one minute before the DST switch at 2 AM on 3/11 (Pacific Standard Time)
// Note: this test uses Local time, so if you're running in a timezone where
// DST doesn't transition the test might not be valid.
var now = new DateTime(2018, 3, 11, 1, 59, 0, DateTimeKind.Local);
// Configure schedule to run on the 59th minute of every hour
var schedule = CrontabSchedule.Parse("0 59 * * * *", new CrontabSchedule.ParseOptions()
{
IncludingSeconds = true
});
// Note: NCronTab actually gives us an invalid next occurrence of 2:59 AM, which doesn't actually
// exist because the DST switch skips from 2 to 3
var next = schedule.GetNextOccurrence(now);
var interval = TimerListener.GetNextTimerInterval(next, now);
Assert.Equal(1, interval.TotalHours);
}
public void GetNextInterval_NextAfterDST_ReturnsExpectedValue(TimerSchedule schedule, TimeSpan expectedInterval)
{
// This only works with a DST-supported time zone, so throw a nice exception
if (!TimeZoneInfo.Local.SupportsDaylightSavingTime)
{
throw new InvalidOperationException("This test will only pass if the time zone supports DST.");
}
// Running on the Friday before the DST switch at 2 AM on 3/11 (Pacific Standard Time)
// Note: this test uses Local time, so if you're running in a timezone where
// DST doesn't transition the test might not be valid.
// The input schedules will run after DST changes. For some (Cron), they will subtract
// an hour to account for the shift. For others (Constant), they will not.
var now = new DateTime(2018, 3, 9, 18, 0, 0, DateTimeKind.Local);
var next = schedule.GetNextOccurrence(now);
var interval = TimerListener.GetNextTimerInterval(next, now, schedule.AdjustForDST);
// One week is normally 168 hours, but it's 167 hours across DST
Assert.Equal(interval, expectedInterval);
}